I-polyphagous shot hole borer (SHB), Euwallacea sp.kunye ne-Fusarium dieback, I-Fusarium euwallaceae, sisinambuzane esitsha: izifo ezintsonkothileyo ezibangela ukwenzakala kunye nokufa kwimithi emininzi yenkuni kunye neyokuhombisa yamaplanga aqinileyo kumazantsi eCalifornia. I-ambrosia beetle inoluhlu olubanzi lweendwendwe kwaye inokugqibezela ukukhula kwiintlobo ezingaphezu kwama-20, kuquka i-avokhado, IPersea americanaImaple yamagqabi amakhulu, I-Acer macrophyllumUmdala webhokisi yaseCalifornia, acer negundo Nantsi lapho. California, California yesicamore, I-Platanus racemosa, unxweme uhlala e-oki, Iquercus agrifolia, iimbotyi, URicinus communis, umngcunube obomvu, Salix laevigatakunye ne-alder emhlophe, Alnus rhombifolia.
I-US Forest Service Region 5 Forest Health Protection kutshanje yenza uxwebhu olubonisa iimpawu zokulimala ezenziwe yi-SHB. Cofa apha ukukhuphela uxwebhu.